SITE.su is an online marketplace specializing in domain names, with more than 40,000 listings across the .ru, .su, and .рф zones. The service offers both immediate online purchases and domain rentals, giving businesses and individuals flexible ways to secure an address for a website or project. Purchased domains are transferred online, while rentals allow customers to use a domain by assigning their own DNS servers. Rental agreements include a priority right to buy the domain, with the purchase price fixed in the contract; agreements can last up to 50 months.

Customers can browse the full domain inventory, download a list in Excel, or use advanced search to find names by criteria or keywords. Listings display purchase and monthly rental prices, along with details such as domain age and indicators of search visibility. Users can submit questions or price offers, and the site provides help, contact information, and online chat. SITE.su focuses on making domain selection, negotiation, purchase, and rental accessible through a single marketplace.